Hi. I am new on Blynk. I want to ask if there is any limitation per month on data usage in the free plan.
No, there are no practical limitations.
If you want to use SuperChart then only 1 data point is recorded in the database every minute, for each virtual pin. However, that’s the same if you create your own local server. You can send more frequent updates, but they’ll be averaged-out over a 1 minute period and the result stored in the database.
There are restrictions on the number of notifications that can be sent…
Emails - limited to one every 5 seconds and a maximum of 100 per day
Notifications - limited to one every 5 seconds per device
Twitter - limited to one tweet every 5 seconds
Thank you for your quick responce!